Measuring approximately 3 3/4 by 5 3/4 inches (the CGC encapsulation sleeve is slightly larger), this postcard from The Vintage Art of DC Comics 100 Postcards set features the cover to The Dark Knight Returns #1.  It is signed by hand by both Frank Miller and Klaus Janson.  Please note- the signatures are real.  They are not pre-printed images on the postcard.  With Signature Series, a certified CGC witness actually observes the signing of the collectible so there is no possibility of the real autograph being switched out with another.  It will be shipped with the utmost care.